Beating engine



A. AEVLDERT BEATING ENGINE Filed April 5, 1941 Aug. .22, 1944.

' 2 Shgets-Sheet 1 M W W Aug. 22, 1944. A. AELDERT HEATING ENGINE Filed April :5, 1941 2 Sheets-Shee t 2 Patented Aug. 22, 194-4 BEAIING ENGINE August Aeldert, Dusseldorf, Germany} wasted in the Alien Prope ty Gnstodian Application. April 3, 1941 Serial no. 386,739

3 Claims. (c1.-9,2.-:;24:)

s T sinventi n re ates to i provement i h ing engines or 'Hollanders sed in theman'ufac ture of paper and other materials for beating, refining, mixing and bleaching the pulp.

.Such engines were hitherto usually provided with two or more rolls, but the desired increase of efliciency was not attained because in spite of a plurality of rolls only one stock-circuit was employed as in the well-known sin le-r011 beating engines.

The object of my invention is to employ novel means by which the .stufi containedin the beating tub is subdivided in two or more partial streams of which only one partial stream is allotted to each beater roll.

Another object of my invention is to provide novel means by which the quantity of stuff treated by each roll is eonveyed to a common circuit.- channel situated at ahigher lever than the bottom beneath the roll from which the whole of t e t fi ai e "b ing a a n ubdiv e nto a number of; partial streams may always descend and flow back again to the space before the single grinding rolls. a

A further object oimy invention is to procure a device the efiiciency of which is considerably increased -by each grinding roll being loaded only witha fraction of the stuff-stream.

1 A further object of my invention is toprocure a device in which the grinding period is'substantially decreased owing to the fact that instead of one single stuff-stream .of great length a plurality of stun-streams of shorter length are treated by the grinding rolls.

A further object of my invention is to procure adevice in which the stufi-streams collected in a common receiving gutter are thoroughly mixed whereby all fibers and bundles of fibers are completely dislocated and anintimate'mixture oi the single fibers is obtained.

A further object of my invention is to procure a device in which by a complete mixture of the i. e. by avoiding anyregularity in the distribution of the 'stufi between "the shorter way across and the longer way along the Walls of the tub a more uniform grinding of all particles of-the stuff is obtained.

[A further object of my invention is -to provide a device the efiect of which is increased by employing an enlarged grinding width which may be increased to any desired extent, the drawbacks otherwise connected therewith being avoided'by a shortercentral way and a longer peripheral way of the stuff. I A further object-of myinvention is "to provide a device requiring onlyIa very small place where.- by an increased efliciency .of the whole plant on the samefloor space is obtained;

other objects and advantages will appear in the" following specification, and the novel feaires ief the nven i n will be p rticul rly pointed. outi t e ap en ed c aims.-

he invention will ;1 i c os s ot onal side vie of the an paratus according to the inyention on the line Fi 2 i a a iew o the a a atu Shown in Fiethe cover be n removed;

' "Fieb ng a p an View sim lar-tome. 2 sh a modificat n, and

i Fig. 4 b i g lihewisea pla view ,s lar to Fi 2 o 3 ho s ill another mod fication,-

s- 5 and '6 sh w in ver cal crow-mot on and i p an ew sp tively the 'iflVIGBtiQn as a lied to a s ooths ove thr Hollan e the 1 0 !!bfiil gm tfi ihi fi 6 h the mod ficat n i lustrat d in Figsv1 and 2 .Aand B d ote wo op osite y rotatin gr nd n; r s un ed n the .i h iisqand l ,J'ournai d in the i e inai alls I a d F o he rind ng tub G a H and J espect vely- 'In"the middle vbetween.the two rolls A and B .a v, h .R i Pr v d d i o wh h he tu f f d half-,stnfis are transported over the brid es or back-falls S and 8; respectively by the rotation of the grinding rolls A and B, The back falls S1 and S2 are bent in the grinding tub at right angles so as ;to surround the rollsontwo sides, one iront face of each roll being adjacent to the wall F of the tub, the other front faces being open toward the channels T1 and T2 which communicate with the channel R, 7 The-channel R and the channels "I31 and T annexed thereto at both sides behind the rolls A and B are provided with a steep slope so that the material conyeyedby the rolls over the back- -f al-ls S1 and Sgin-to the channel R continuously flows downwards by gravity until it reaches the ingresses Krand-K of the rolls A, B, whence-the material is again sucked up 'by the rolls A, B and transported anew into the channel R, where upon the circulation of "the stuff separately for each ofthe-rolls isfrepeated. To facilitate the division of the stream in the channel R in two separate streams flowin to the lateral channels T1 and T2 respectively a partition O projecting into cha'nnel R is provided; v During the circulation of the stufi in two dist ct c i he tu is round an 'hh this we) suflicient im or mixin 1 9191151 s t eii ifi ohi dur i n t e ma e ia to h ground. is obtained in the desired state.

FIhe' grindingrolls A and B are of nsual conv ru sm n h in most: ca e a ioo ri ated s r ac as ind a ed n h d wihei- B neath the ro l t hoiboitoni .p ri'o th 'bao snie ls 1 and 2 he-hedhlates L1 and mo e a a ged which are provided in the well known manner modes of operation. The grinding rollsrnay be Y.cons'tr ucted from, difierentmaterials, for inone withmetal bars and the other ,I nay be made of stone or the lilge Eurthermore the. two grinding trolls maybe made to work wayoi example Figs andfi point of the channels of circulation, outlet openings N1 and N2 are arranged which ordinarilymay be kept closed by valves or cocks.

In the modification shown' in Fig. 3'the grind; ing rolls A and B are arranged at equal distances from the lateral wal1s E and-and are. surrounded by U-shaped back-falls 'S1 and S2 so that the channel R between both rolls' is-open atbothsides. Each roll is enabled to lie in two partial' streams, as shownJby the arrowsli I I n this modifi cation the channel R is: slop- 11mg bilaterally, four channelsof circulation T1, T2; T3, T4, likewise slop'ing',adjoining the channel R. Each two pamerareams T 1 ,'T2 andTa, 1T4 unite beforethe rolls at Ki "and Kz'andi then 're-enter jointly th rolls. i

The mode of operation differs-fromthat of 'the modifi'cation'shown in Figs. 1and2 by four partial streams being provided instead' of two. In the "modification shown'jfin' Fig. 4 likewise four partial streams are provided 'as indicated by arrows P. 'In I this case, however, the partial streams are produced by four rolls A1, A2, B1, B2 each of which is" confined towardthe middle of Lthe'tub ,by back fall's s sass, s4. By the back-,- "falls S1 and S3 the overthrow .channel R1 is formed, and by the back-falls .Sa'S-ris'formed a second overthrow channel B albothvof themslop- I ing toward themiddle of the tubl The partial strear ns T1 and T2 are situated between ,the rolls Ai', A2 8.110131, B2 respectively; or between the'corresponding parts vof the r'ecta gu arry bent'backfalls S1, S2 and 53,54 respectively. I In thejmiddle .of the, tub the, streams coming from the channels R1 "and'Rz are diyidedand fiowoffi by pairsto'the fright orv left hand respectively through the channels;'I 1. and T2. At

the front sidesor" the tub the partialstreams are Tagain divided and each pairof partial streams is again returned'to the rolls A i, A2 B1; B2 respectively,

iiiiiieflebbves awe d.B tingengines 7 orv holland erspermits of pdifierent i fi. difiererit r .n. Pr ssure o .Q m s win i fi Ca e il yasa, st i acqe e ar tor. .m. I

- h i v htimm i' al o-be a vant e qus ape plied to the s o-called overthrow hollanders in which the stud is projected over the top of the grindng roll. 'I'his modification is shown ,-by

The two grinding rolls -A and B are rotated in opposite directionsll"I'he iiigress sides of the rolls A and i3 ia ce each other; Each these rolls throws the stuff over its top into the common gutter r. imam this gutteraare branched "o'fito' thejfright and to the left I circulation'fchannels tr, an ftz' lead ng with a stepfs'lope from the'gutterrftothe ret ur'nfchanfnjelsqi and qz'JOY, which the stufif'is conducted "into 'the space z'j belowthe gutter? whence it' is skimmed' ofi' byftlie grindingrolls for repeated grinding and subsequent circulation. I

ceive two streams of Without departing from the principles of the present invention, I may return only part of the stuff to the gutter or into the channels of circulation b'y' projectiifg"j it"o ver itlifeitop of the each single stream being always supplied to its v. proper roll.

I claim: 2 1'. In a beating engine of the overthrow type,

the ingresssides of 'saidrolls facedjtoward' one another;,t wo superposed conduitsextending substantially parallel. to said shafts transversely of the tub, the upper b"'ng' sio positioned 'asfto-reerthrown material from the rolls, respectivelyfarid the lower being so positioned as to supplythe saidmaterial to the ingress. sides ofthe roll s j'and two 'con'necting conduits between 'the transverse conduits and so disposed asjto"conduct two' str'eams of material, respectively, from 'the upperto the lower conduit, each of saidsuperposedfconduits being adapted to .comm'in'gle the twoastreams of material supplied to it, and cause the material to flow as a, single streamtransversely of thetub.

" 2.. In abeating engine'of the overthrow type, the combination of a tub havingtwo sides; two oppositely rotating substantially parallel shafts journaledin said sides; a grindingrollfcarried by each shaft to rotate therewith and,extending into the tub, with thesijngiies's sides .of said rolls faced towardo'riel.anotherlfsaiduolls beingjadapted to cause .tw ovstreams of ioverthrown material to .flow; in opposite directions toward the middle of thetub adjacent one of said sides; receiving 'mearisfor'the overthrown material adapted to cause said two. streams to commingle and flow as asingle stream toward the other side of. the tub; means adapted to divide-said single stream into 't Is trea InsIand to -conduct the said two ,streams o'i material from the said receiving means respectively, and means adapted to commingle said twofstr'eams ,to fo'rm a single stream, and conduct said single-stream to the ingress sides of therolls the two sin gle streams flowing in diametrically opposite directions.

. 3. In a beatingengine of the overthrow type,

the combination of atub; two oppositely rotating other; a gutter disposed between; therolls and adapted to receive the overthrown material from said rolls, said; gutterextending' substantially parallel to said shafts and inclined downwardly from its receiving end toward one side of the tub; .a' partition extending from: said side into said gutter, thereby dividir'ig the disoharge end of the utter into two channels transverse-to the gutter; a conduit extending substaritiallyparallel to said shafts below saidi'gutterl'and between the ingress side's'of lsaid rolls'gi a nd twee-shaped channels connecting'jthe.}gutterchannels, respec- 

